How to update primary key from Entity Framework?

Question

I have Table

eventid int -- not PK key but with autoincrement
jobid -- PK autoincrement disabled
userid  int   -- PK autoincrement disabled

Answer 1

Updating primary key columns is not a good practice with EntityFramework. It confuses EF because it changes the identity of the object, and makes keeping the in-memory copy and the in-database copy of the data in sync very problematic. So it's not allowed.

Just don't update primary keys. Instead delete one row and insert a new one.

Alternatively you can update the primary key directly with a stored procedure or other query.